Gigantopteris

Japanese: ギガントプテリス

〘Noun〙 (gigantopteris) A fern-like fossil plant that flourished from the end of the Carboniferous Period to the middle of the Permian Period. It has simple or compound leaves and no petioles. The edges of the leaves are sawtoothed , with lateral veins running parallel to the midvein and a mesh-like network of veins. Its classification is unclear, but it is thought to be close to the cycad fern. It is widely distributed from China and Korea to Malacca, Sumatra, and New Guinea.

Source: The Selected Edition of the Japanese Language Dictionary About the Selected Edition of the Japanese Language Dictionary Information

Japanese:

〘名〙 (gigantopteris) 古生代石炭紀末から二畳紀中頃まで栄えたシダ状の化石植物。単葉または複葉で、葉柄(ようへい)はない。葉の周囲は鋸歯(きょし)状、主脈から側脈が平行に出て、網目状の細脈をもつ。分類上の位置は明らかでないがソテツシダに近いものとみられている。中国、朝鮮からマラッカ、スマトラ、ニューギニアまで広く分布する。

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